The addressee is possibly Spencer Wilkinson the journalist and military writer.

Provenance:
From an album compiled by Florence Pearl Faithfull (known as
"Pearl"), later Lady Dilke. Pearl Faithfull was the daughter of
H.M Faithfull, solicitor of Sydney, New South Wales and the grand-daughter
of the Australian pioneer and politician William Pitt Faithfull. In 1915
she married Sir Charles Wentworth Dilke but following his insanity and
subsequent death in 1918 she returned to Australia. Many of the
autographs in Pearl Faithfull's collection have an Australian or colonial connection